西安市黑河水库左坝肩渗漏三维数值模拟及坝肩坡体稳定性分析

直接针对西安市黑河水库左坝肩渗漏这一重大工程实际问题展开研究与计算。应用三维有限差分方法对左坝肩单薄山梁的初始渗流场、蓄水后的渗流场进行了数值模拟 ,分析渗漏方式、计算相应的渗漏量 ,并通过计算说明了断层是集中渗漏通道。而后利用三维数值计算提供的水位值 ,应用极限平衡分析法 ,对左坝肩岩质斜坡稳定性进行计算与分析 ,计算结果对实际工程的决策与治理提供重要的依据。

THREE-DIMENSIONAL NUMERICAL SIMULATION OF LEAKAGE AND STABILITY ANALYSIS OF LEFT DAM ABUTMENT OF HEIHE RESERVOIR

In the article ,the authors mainly study and calculate a significant engineering problem about water leakage in left dam abutment of Heihe Reservoir. A three-dimensional finite difference method is used to simulate seepage flow under natural conditions and high hydraulic head was simulated, the way of percolation was analyze and the quantity of leakage at left dam abutment of Heihe Reservoir was calculated. A fact that the fault became a conduit for intensive percolation is verified by the calculation. Then according to hydraulic head, using three-dimension finite-difference method, we calculate water table and the stability of slope at left dam abutment is studied and analyzed by using limit equilibrium analysis method. All the results are of important referential value for the decision -making and design of practical engineering project.